Home and Away favourite set to have their world turned upside down by THIS shock bombshell

Dean Thompson discovers a shocking family secret in today's Home and Away...

Home and Away newcomer Mackenzie Booth drops the bombshell that she is Dean Thompson’s half sister, but how will the surfer react to the news he has a sibling that he never knew existed?

Ever since Mackenzie was revealed as the new owner of Salt, Summer Bay residents and Home and Away fans alike have been wondering what has brought this mysterious new face to town.

But the wait is over, because today Mackenzie reveals she is Dean’s sister, and that they share the same dad – Rick Booth.

Home and Away, Mackenzie

Mackenzie was recently revealed as the new owner of Salt (Picture: Channel 5)

Ever since she arrived in Summer Bay, Mackenzie has taken a great interest in Dean and his best friend Colby Thorne.

But while it seemed that she might have a romantic interest in Dean, it turns out that couldn’t be further from the truth.

Today’s episode sees Mackenzie asking the pair to teach her to surf, but as Dean tries to talk to her about which board a beginner should be using, she is more interested in finding out his family history, leaving him rattled.

Home and Away, Mackenzie Booth

Mackenzie has been using Colby to find out more about Dean (Picture: Channel 5)

Mackenzie makes sure she keeps bumping into Dean and Colby in the hope she can get as much information about her secret brother as she can. But it is only when Dean finally calls her up on all the attention she is giving him that she is forced to confess her true identity.

It won’t come as a surprise to soap fans that Dean doesn’t take the news that Mackenzie is his half sister well.

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He’s shocked that his dad could have had other kids that he didn’t know about, and Mackenzie’s bombshell is clearly going to take some time to sink in.

Home and Away, Mackenzie Booth, Dean Thompson

Mackenzie reveals her true identity to Dean in today’s Home and Away  (Picture: Channel 5)

But is she just in town to meet her long-lost sibling, or is there more to her arrival?

Having just paid through the nose for Salt, it seems Mackenzie doesn’t have any plans to be going anywhere any time soon… but what does this mean for Dean?

Next week will see Mackenzie reveal that the real reason she wants to get to know Dean is to do with their dad… but will Dean want to get involved with the family he has tried to forget?

Watch Home and Away every weekday at 1.15pm and 6pm on Channel 5